3550 and Multi VLANs

I upgraded a 2924 to a 3550 and am having trouble configuring my
VLANs. I have two VLANs and port 24 should be a member of both
because it's the Internet feed. On the old 2924, I did this with the
following statements:
switchport multi vlan 1,2
switchport mode multi

Advertisements

Bob Simon wrote:
> I upgraded a 2924 to a 3550 and am having trouble configuring my
> VLANs. I have two VLANs and port 24 should be a member of both
> because it's the Internet feed. On the old 2924, I did this with the
> following statements:
> switchport multi vlan 1,2
> switchport mode multi
>
> How do I accomplish this with the 3550?

I think you'll find that "switchport multi" isn't
supported on the more-modern hardware such as the
3550-series.

Does whatever is connected to port 24 have
support for 802.1Q? If so (like it's a reasonably
modern Cisco router), you should configure multiple
subinterfaces on the thing connected to port-24,
and then set port-24 to be a trunk port.

Advertisements

On Mon, 18 Oct 2004 16:14:34 +0100, PJML <>
wrote:
>Bob Simon wrote:
>
>> I upgraded a 2924 to a 3550 and am having trouble configuring my
>> VLANs. I have two VLANs and port 24 should be a member of both
>> because it's the Internet feed. On the old 2924, I did this with the
>> following statements:
>> switchport multi vlan 1,2
>> switchport mode multi
>>
>> How do I accomplish this with the 3550?
>
>I think you'll find that "switchport multi" isn't
>supported on the more-modern hardware such as the
>3550-series.
>
>Does whatever is connected to port 24 have
>support for 802.1Q? If so (like it's a reasonably
>modern Cisco router), you should configure multiple
>subinterfaces on the thing connected to port-24,
>and then set port-24 to be a trunk port.

It's a 3640 running 12.2 so I don't doubt that it supports dot 1 q.

Thanks for the tip. I think I can handle this now with your
direction.

switchport multi isn't supported anymore.
Either use a dot1q trunk to transport the vlans to the internet router
(which needs IOS Plus feature pack to do this) or create a VLAN3 on the
switch, solely for the purpose of connecting the switch to the internet
router:
- Assign interface VLAN1 the address of the internet router's vlan1,
- Assign interface VLAN2 the address of the internet router's vlan2 and
- Assign vlan3 on the switch a new ip address (a new range /30 will do) and
assign ethernet port on router with the other address from vlan 3.
- Setup routing on the switch and add a default gateway on the switch to the
internet router.
- Add two routes to the router, one for each vlan off the switch (excl
vlan3) using the switch's address of vlan3 as next hop.
- Happy surfing.....

Erik

"Bob Simon" <> wrote in message
news:...
> I upgraded a 2924 to a 3550 and am having trouble configuring my
> VLANs. I have two VLANs and port 24 should be a member of both
> because it's the Internet feed. On the old 2924, I did this with the
> following statements:
> switchport multi vlan 1,2
> switchport mode multi
>
> How do I accomplish this with the 3550?
>
> --
> Bob Simon
> remove both "x"s from domain for private replies

Share This Page

Welcome to Velocity Reviews!

Welcome to the Velocity Reviews, the place to come for the latest tech news and reviews.

Please join our friendly community by clicking the button below - it only takes a few seconds and is totally free. You'll be able to chat with other enthusiasts and get tech help from other members.
Sign up now!